Piano-truck



F. E. NELSON,

PIANO TRUCK.

APPLICATION FILED MAY l3. I918.

1 322,71 9, Patented Nov. 25 1919.

I will I M w firm 1441 .4

truerstares manna FRANK NELSON; OF MINNEAPOLIS, MINNESOTA.

PIANO-TRUCK.

@ Specification of Letters Patent. Patented NOV. 25, 19 19.

' AppHcation filed May- 13, 1918. Serial No. 234,176.

To all whom it may camera." 7

Be it'knownjthat I, FRANK E. NELSON,

' a citizen of the, United States, residing at which a piano of thegrand type may be secured for the convenient and easy moving thereoffrom one point to another, without the possibility of any strain uponits casters or the legs, which frequently results in damage or injurythereto when the piano is being moved over a rough fioor or deep pilecarpet, and especially when a piano is in use upon a'stage in a theateror other place of amusement.v

Another ob'ect of the invention is the provision of a truck of thischaracter which can be readily and easily adjusted for use withdifferent sizes of pianos and which may be readily folded when not inuse to occupy the least possible space when stored or transported fromone locality to another. i

A further object of the invention is the provision of a truck of thischaracter, which will be light in weight, and of low manufacturing costyet possessing the required strength and rigidity. I

7 Other objects will be in part obvious and in part hereinafter pointedout.

The invention accordingly consists of the features of construction andarrangement of elements hereinafter set forth and illustrated in theaccompanying drawing, while the scope of the application of which willbe indicated in the following claim.

In the accompanying drawing Figure 1 is an elevation of the truckconstructed 'in accordance Wltll'tllB invention supporting a piano.

Fig. 2 is atop plan view of the truck with the piano removed.

Fig. 3 is a fragmentary detail sectional vv ewtaken on the line 3-3 ofFig. 2.

Fig; dis a sectional viewon the line 4 '-;1 ofFig.2. I l

Fig. 5 is an elevation of one ofthe caster plates of the truck.

Similar reference characters indicate corresponding parts throughout theseveral viewsin the drawing.

Referring to the drawing in detail, A

designates generally the piano truck which comprises a series ofswingingly connected arms, preferably three in number, each ineludinganouter tubular rod section 5 and an inner solid slidable rod section 6which telescopes within the inner end of the tubular rod section 5,which inner end of the latter is reinforced through the medium of anexternal collar 7 The inner end of the slidable rod section 6 is formedwith an eye 8 and threaded in the collar 7 is a set screw -9 which worksthrough the tubular section 5 to engage the slidable section 6 forsecuring the same in adjusted position. It will be evident that the armscan be lengthened and shortened by adjusting the slidable section 6relative to the tubular section 5 thereof.

The inner eye ends 8 of the slidable section 6 are connected through themedium of a detachable pivot 10' for, swingingly connecting the arms toeach other so that they may 'be adjusted as the occasion may require.

On the outer ends of the tubular rod sections 5 are angle plates eachhaving its vertical flange 11 fixed centrally to the outer endof thecorresponding rod section 5. The

horizontal base portion 12 of each'plate is formed with a centralopening 1370f a size suflicient to receivethe caster 14 in a pianoplate. On opposite sides of the opening 13 in the base portion 12 of theangle plate and rising therefrom are socket sleeves or V thimbles 16which have split contracted upper ends 17 for frictionally gripping thestems 18 of casters 19 which are removably fitted in said sleeves orthimbles 16 and held sw-iveled therein. The casters, including the stems18, are of the ordinary well known construction employed with articlesof furniture. V V

The mounting of the casters 19in the angle plates movably support thetruck structure upon a floor or-foundation and these casters 19 properlyelevate the piano supported upon the truck above the 'floor orfoundation and enable the convenient movementiof the piano from onepoint to another, it being understood of course that the angle platesreceive the three legs of the piano, while the arms serve as braces.

On each 'rod'section 5 is a loop 20 in which is engageda holding strap21 of any approved form to retain the piano upon the truck. It is ofcourse to be understood that the casters can be varied or changed asthe.

, occasion may require.

As shown in the drawlngs, the sleeves or thimbles 16 are spaced fromeach other'and lie at opposite sides of the openings 13, these sleevesor thimbles thus forming stops for the reception of the feet of thepiano there-- between to prevent the feet from shifting laterally fromthe base portions 12 of the angle plates, while the straps 21 hold thepiano feet between the sleeves or thimbles 16.

What is claimed is A piano truck comprising aplurality ofrelativelyadjustable telescopic arms, plates 7 1 carried by the ends-ofthe arms for the .re-

ception of piano feet thereupon, said plates having openings therein forthe reception of piano casters carried by piano feet restingupon theplates, upstanding downwardly opening socket members carried by theplates at opposite sides of their openings, said socket members beingspaced forthe reception of piano feettherebetween, and

In testimony whereof, I aflix my signature,

Witnesses: v a

G. C. JOHNSON, H. OFTEDAL.

